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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: How does a lower current for the heater at the same voltage affect GM? posted by John PA on October 22, 2023 at 13:08:56:
Lower heater current boils fewer electrons off the cathode if your cathode has the same formulation/size/heater structure.
There is the life test on some heaters which simply cuts the heater voltage a certain percentage.
Lower heater voltage can extend the life of the heater. This could be the purpose in a military spec tube, to make them last longer in a war.
Am I missing your question?
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Follow Ups
- RE: How does a lower current for the heater at the same voltage affect GM? - Chip647 18:31:54 10/22/23 (1)
- I understand that but . . - John PA 19:19:55 10/22/23 (0)
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